Fan flow thinking help

[LewisBloom]

Hello you lovely people,

 

I always feel guilty as I only ever visit this forum when I am in need of help and advice but you guys always knock it out the park so here I am again. Ive got a question regarding the current thinking of how fans should be setup on my case. So iuve a radiator on the front with three fans, two on the top of the case and one on the back of the case. GPU has its own fans down toward the lower half of the case (3080Ti)

 

I believe I am a year or so older than Linus and I got into PC's slightly earlier and been building my own, for all PC's except this one. I decided time and money wise, I could afford my very first pre-build. Specced it all out and ive been happy with it except the fans it came with seem to be trashed and maybe installed all wrong meaning the PC runs very hot under heavier VR loads. I am going to replace the fans but not sure how to set them up.

TL:DR
if the radiator is on the front should I have the rear fan blowing in and the front fans blowing out, and then what should the top/roof fans be doing, blowing in or out of the case?

 

thanks,

Lewis

[Hairless Monkey Boy]

Front fans in, everything else out.

 

For balanced airflow, control the exhaust fans to spin more slowly than the intake fans.

 

Your issues with over heating may be due to the design of the case. Many prebuilts come with terrible cases. which one do you have?

[LewisBloom]

Oh buggar yes, so the case is;
CORSAIR 4000D BLACK CASE 

 

This is my cooler;

CORSAIR HYDRO H150I RGB PRO XT CPU COOLER

For nutjob reason even though I was balls to the wall on the system I decided at the time to replace the fans with cyberpower UK fans, and they really are trash.

[Hairless Monkey Boy]

10 minutes ago, LewisBloom said:

CORSAIR 4000D

It's a fine case. The airflow version is obviously better, but the standard 4000D isn't too bad.

 

If it's the GPU overheating (or getting hotter than you'd like), I recommend looking into under volting it with MSI Afterburner.

[LewisBloom]

Okie dokie, yes its the entire system gets a bit on the hot side but its not always which is always a little weird (flight sim, sim racing sometimes seems to be fine othertimes the case really hot to touch with the side glass getting pretty toasty.

Not sure if you have access but I updated my profile with the full system specs, having all the Hard drives (for work) probably doesn't help with the heat as I think I am somewhat maxxing out what is possible to cram into the case.

Ill do some googling on the undervolt stuff, as that's something ive never had to do before. I expect things will improve once I get this flow thing sorted though. Even when I ramp the fans up its not clear using my hand to know if a fan is exhausting or sucking in, which I figure is the sign of a really bad fan. Thinking I might get three Notua fans to replace the exhaust and two top fans. Thankyou so much for your input so far its super helpful, as I said in my first post, though I watch LTT videos so much I always feel guilty only coming here cap in hand asking for help, it truly is appreciated.

 

cheers,

Lewis

[jones177]

Air cooled 3080 tis are hard to cool especially in cases with a traditional setups. Some like the FTW3 Ultra(400 watts stock) are extremely hard to cools.

 

The issue is that hot air gets trapped below the GPU and gets ingested by the GPU over and over again.  

This video shows the issue.

 

For my gaming PCs I now use cases that intake from the bottom and exhaust everywhere else.

For my traditional cases with PSUs below the GPU I add a 60mm fan below the GPU as an exhaust or an intake. Whatever works.

 

[manikyath]

something i've found can help a bit is to add a fan at a 45 degree angle at the front of the gpu, to 'motivate' some air into the GPU, instead of just relying on the front fans to move air all the way down.